Improvement in horseshoes



I DAVID GRIM.

Improvement in Horse Shoes.

Patented Nov-14,18.

\ UNITED STATEs PATENT QFFICE.

'nAvin GBIM, 0F PITTSBURG, PENNSYLVANIA.

lMPROVE-NIENT IN HORSESHOES'.

Specification forming part of Letters Patent No. 120,813, dated November 14, 1871.

. To all whom it may concern:

Be it known that I, DAVID" Gain, of Pittsburg, in the county of Allegheny and State of Pennsyh Vania, haveinvented certain new and useful Improvements in Horseshoes, of which the follow- ;ing is a full, clear, and exact description, reference being had to the accompanying drawing forming part of this specification, in which- Figure 1 represents a perspective view of my improved horseshoe with one of itsheel-calks detached; Fig. 2 a perspective view of said dotached heel-calls; Fig. 3, transverse vertical section of a heel-call: and that part of the shoe whereon it rests; Fig. 4, similar section of the trail-tapering rib, B. In this rib and near its base, and on opposite sides thereof, I make long shallow indentations 0, so arranged with respect to each other as that, when the bar is bent to the shape of ahorseshoe, one indentation willbe on each side of the rib B' at those points-intended for the reception of the calks c c, whichcalks may be made of malleable cast-iron, wrought-iron, or steel, and so shaped as to represent a wedge in their general outline. In the of each of these calks a deep A-shaped groove, 3 is cut, corresponding in size and form to the 1-16 B, each groove being provided with small inside projections B, answerable in. position and proportion to the oblon indentations so that when a call: is set astri e of the rib at e the proper place and force applied the jaws or groove of the call; will open enough to enable it to pass down the rib until the projections R are each opposite its respective indentation 0, when it will spring into place, as represented in the sectional drawing, Figs. 3 and 4, which shows the projections on the calks c c as having entered their proper indentations e, and by which means they are held firmly and securely in posi:

tion without any other contrivance, requiring no little force to disarrange or detach them.- But where the calks require to be doubly secured, as, for instance, those that are to be used on the rough pavements of a city, then and in that case I pass a rivet, a, through each calk and its inclosed portion of the rib B, which, by preventing the spread of the groove 8, strengthens its attachment to the shoe. I have also provided the toe-calks c with a clip, is that extends above the margin of the shoe and i orms a protection to the hoof at that point, and also assists in holding the shoe steady on the foot. In the sectional drawing, Fig. 5, the toe-calk oi's maintained in position partly by a projection, R, fitting into a groove, 0, on one side of the. rib only, and a keywedge, a), driven between the calk and rib on the opposite side, the spreading of the callrand its consequent displacement being prevented by the peouliareonstruction and arrangement of parts.

-I claim- A horseshoe formed with a high central rib, 13, provided with indentations e, in combination with toe and heel calks c 0', so constructed and arranged as to set astride of said rib and be maintained in place by their inside projections R resting in the indentations of the rib, substantially in the manner shown and set forth. 

